package com.alinesno.cloud.base.message.task;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

@Configuration
public class ExecutorConfig {

	private static final Logger log = LoggerFactory.getLogger(ExecutorConfig.class);

	@Bean
	public Executor asyncServiceExecutor() {

		log.info("start asyncServiceExecutor");

		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();

		// 配置核心线程数
		executor.setCorePoolSize(5);
		// 配置最大线程数
		executor.setMaxPoolSize(5);
		// 配置队列大小
		executor.setQueueCapacity(500);
		// 配置线程池中的线程的名称前缀
		executor.setThreadNamePrefix("async-base-message-");

		// rejection-policy：当pool已经达到max size的时候，如何处理新任务
		// CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
		executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
		// 执行初始化
		executor.initialize();
		return executor;
	}
}